CN101303476B - Backlight module and LCD device using the same - Google Patents
Backlight module and LCD device using the same Download PDFInfo
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- CN101303476B CN101303476B CN2007101028095A CN200710102809A CN101303476B CN 101303476 B CN101303476 B CN 101303476B CN 2007101028095 A CN2007101028095 A CN 2007101028095A CN 200710102809 A CN200710102809 A CN 200710102809A CN 101303476 B CN101303476 B CN 101303476B
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Abstract
The invention discloses a backlight module and a liquid crystal display (LCD) device using the backlight module. The backlight module of the invention at least comprises a light guiding plate and at least two light sources, wherein, the light guiding plate is divided into at least two areas and at least comprises a base plate and a plurality of light guiding structures which are arranged on one surface of the base plate and respectively positioned in the areas of the light guiding plate. In addition, the light source respectively corresponds to the areas of the light guiding plate so as to provide light to the light guiding structure in the areas.
Description
Technical field
The present invention relates to a kind of backlight module (Backlight Module) and use its liquid crystal indicator, and be particularly related to a kind of backlight module that scan-type (Scan) and dynamically (Dynamic) show and liquid crystal indicator of using it of being applicable to.
Background technology
In the technology of the dynamic backlight unit of having delivered at present, generally adopt the directly-down light source framework.In the directly-down light source framework, with directly-down light source, for example light emitting diode (LED) is divided into number and distinguishes and directly be arranged in below the display panel, carries out dynamic bright showing slinkingly according to the picture demand again and shows.Yet this kind directly-down light source framework need use a large amount of light emitting diodes, and needs bigger light mixing distance, and strengthens the required thickness of back light unit.In addition, owing to have the mixed light overlap zone between the Qu Yuqu, so the poor effect of subregion contrast.
In addition, can't effectively reduce, research also be arranged at present at side type mixed light framework because adopt the thickness of the backlight module of directly-down light source framework.Though, adopt side type mixed light framework can reduce the thickness of backlight module, so still have the overlapping phenomenon of mixed light between its district and the district, the effect of subregion contrast is also not satisfactory.In addition, for reaching the function that subregion shows, mostly need use complex-shaped light guide plate, volume production yield rate that not only can the serious impact product more makes the amplitude of dimension reduction be restricted, and for undersized display device, thickness is still blocked up and be not inconsistent ideal.Moreover under this framework, light source is adopted the side setting, so the fixing and heat radiation of light source all can increase the complexity of mechanism design, not only can increase the degree of difficulty of the assembling of module, influences the volume production yield rate of product.
Therefore, need a kind of high subregion contrast and more slim backlight module of providing badly, to improve the usefulness of liquid crystal indicator.
Summary of the invention
Because the disadvantages of above-mentioned traditional backlight module, purpose of the present invention is providing a kind of backlight module exactly, it comprises at least two districts, and these districts are respectively corresponding at least one light guide structure in the light guide plate, and not the light guide structure of same district separately corresponding to light source independently, thus, can provide subregion bright dark effect through controlling each light source respectively.Therefore, in the liquid crystal indicator of backlight module of the present invention applicable to scan-type or dynamic display technology.
Another object of the present invention is that a kind of backlight module is being provided, be formed with several light guide structures on its light guide plate, can be corresponding to several viewing areas of display element, because these light guide structures are directly molded on the substrate of light guide plate, therefore can effectively control the gap of respectively distinguishing between the light guide structure, not only can promote display quality, more help the raising of volume production yield rate.
Another purpose of the present invention is that a kind of liquid crystal indicator is being provided, and the light guide structure of its backlight module utilizes the optical fiber fabrication principle to be made on the film substrate, so can obtain the light guide plate of tool minim gap.Owing to the light source that shows sends via the propagation of the light guide structure on the light guide plate, therefore can significantly reduce the usage quantity of light emitting diode or laser diode, and can reduce the mixed light required separation distance widely, so can effectively reduce the thickness of liquid crystal indicator.
Above-mentioned purpose according to the present invention proposes a kind of backlight module, comprises at least: light guide plate be divided at least two districts, and this light guide plate comprises at least: substrate; And a plurality of light guide structures, be located on the surface of substrate, and lay respectively in these districts; And at least two light sources, correspond respectively to these districts, to provide light to the light guide structure in these districts.
According to purpose of the present invention, a kind of liquid crystal indicator is proposed, have at least two viewing areas, wherein this liquid crystal indicator comprises at least: backlight module, at least comprise: light guide plate, have at least two districts, wherein these are distinguished respectively corresponding to above-mentioned viewing area, and this light guide plate comprises at least: substrate; And a plurality of light guide structures, be located on the surface of substrate, and lay respectively in these districts; And at least two light sources, correspond respectively to these districts, to provide light to the light guide structure in these districts; And a liquid crystal panel module, be located on the backlight module.
According to one embodiment of the present invention, the substrate of light guide plate is made up of flexible plastic material.In addition, corresponding to each district, light guide plate is provided with a plurality of light guide structures.
According to another preferred embodiment of the present invention, have a gap between these adjacent light guide structures, and this gap is better for about 50 μ m preferably less than about 100 μ m.
See through the optical fiber fabrication principle and directly on substrate, make the light guide structure of light guide plate, thus, can effectively control the size and the distance of each light guide structure, distance between more can reducing between each district, further can promote display quality, reduce the thickness of liquid crystal indicator, and help the raising of volume production yield rate.
Description of drawings
Fig. 1 is the schematic perspective view that illustrates according to the regional area of a kind of light conducting plate structure of one embodiment of the present invention.
Fig. 2 is the vertical view that illustrates according to a kind of backlight module of one embodiment of the present invention.
Fig. 3 is the vertical view that illustrates according to a kind of backlight module of another preferred embodiment of the present invention.Description of reference numerals
100: light guide plate 100a: light guide plate
102: substrate 102a: substrate
104: light guide structure 104a: light guide structure
106: breach 108: highly
110: width 112: gap
114: the first district 114a: first district
114b: 116: the second districts, the 6th district
116a: the second district 116b: SECTOR-SEVEN
118: the three district 118a: the 3rd district
118b: 120: the four districts of Section Eight
120a: the 4th district 120b: the 9th district
122: the five district 122a: the 5th district
122b: the tenth district 124: light source
124a: light source 124b: light source
126: light source 126a: light source
126b: light source 128: light source
128a: light source 128b: light source
130: light source 130a: light source
130b: light source 132: light source
132a: light source 132b: light source
134: light guide structure 134a: light guide structure
134b: light guide structure 136: light guide structure
136a: light guide structure 136b: light guide structure
138: light guide structure 138a: light guide structure
138b: light guide structure 140: light guide structure
140a: light guide structure 140b: light guide structure
142: light guide structure 142a: light guide structure
142b: light guide structure 144: backlight module
144a: backlight module 146: light
Embodiment
The present invention discloses a kind of backlight module and application thereof, the light guide structure of the light guide plate of this backlight module can directly be produced on the flexible substrate, so the thickness of light guide plate can be effectively reduced, and the distance between size, spacing and each viewing area of light guide structure can be accurately controlled.Therefore, can reduce the usage quantity of light source components such as light emitting diode or laser diode widely, promote display quality, improve the volume production yield rate, more can dwindle the thickness of liquid crystal indicator.In addition, because the light guide structure of different viewing areas is separately corresponding to the independent light source of controlling, therefore can light in different time through controlling each light source respectively, provide subregion bright dark effect, quite be applicable in the liquid crystal indicator of scan-type or dynamic display technology.In order to make narration of the present invention more detailed and complete, can be with reference to the diagram of following description and cooperation Fig. 1 to Fig. 3.
Please refer to Fig. 1, it illustrates the schematic perspective view according to the regional area of a kind of light conducting plate structure of one embodiment of the present invention.Light guide plate 100 mainly is made up of with a plurality of light guide structure 104 substrate 102 of film like, and wherein light guide structure 104 can for example directly be made and be installed in press moulding mode on the surface of substrate 102.Substrate 102 is in order to carry these light guide structures, and its material can be selected flexible material for use, plastic material for example, and wherein plastic material can be polyethylene terephthalate (PET) or polymethylmethacrylate (PMMA) or the like.The material of substrate 102 also can be selected glass for use, perhaps general scattered reflection sheet or silver-colored reflector plate or the like.Light guide structure 104 adopts fiber optic materials, so light conducts in the total reflection mode in light guide structure, and has high conduction efficient.The more corresponding display device of the upper surface of light guide structure 104 and/or lower surface is required goes out optical position and is provided with surface structures such as at least one lattice point structure or at least one breach, breach 106 for example shown in Figure 1, destroy the total reflection conduction of light by these surface structures, make light 146 be able to penetrate light guide structure 104, and provide light source display surface from these surface structures.In the present invention, the gap 112 between two adjacent light guide structures 104 is preferably less than about 100 μ m, and is better for about 50 μ m.In a preferred embodiment of the present invention, the height 108 of light guide structure 104 is about 250 μ m, and width 110 also is about 250 μ m, and is a light guide bundles (light guiding pipe).Utilize fiber optic materials to make light guide structure and be found in the EXX-TMW-COR product that Exxelis company limited is provided.
Because substrate 102 can adopt flexible material, therefore can increase the application of light guide plate 100.In addition, because substrate 102 is a film, add that light guide structure 104 directly is produced on the surface of this film substrate 102, and utilize this light guide structure 104 to carry out mixed light, replace traditional direct type backlight module carries out mixed light with bigger light mixing distance mode, therefore can reduce the integral thickness of the backlight module of being formed by light guide plate 100 of the present invention widely, for example the thickness of backlight module can be reduced in the 2mm.Except that this, because light guide structure 104 directly is made on the surface of substrate 102, therefore not only can effectively control the gap 112 between adjacent two light guide structures 104 and the size of light guide structure 104, more can reduce the gap 112 between adjacent two light guide structures 104 widely, for example in the present embodiment, the only about 50 μ m in gap 112 between two adjacent light guide structures 104, and the density of surface structures such as lattice point structure on the cooperation light guide structure or breach design, and then the outgoing light homogeneity that can promote backlight module.
Please refer to Fig. 2, it illustrates the vertical view according to a kind of backlight module of one embodiment of the present invention.Backlight module 144 mainly is made of light guide plate 100 and several light sources 124,126,128,130 and 132.These light sources 124,126,128,130 and 132 can be made up of light emitting diode or laser diode, and wherein these light sources 124,126,128,130 and 132 power supply are preferably independently of one another, and can independently control its switch.In the present embodiment, light guide plate 100 is divided into the Cheng Wu district, i.e. first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122, these zones correspond respectively to several viewing areas on the display module (not illustrating) thereon of position.Be equipped with several light guide structures 104 in each district in first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122 of light guide plate 100, the distance that adjacent two light guide structures in wherein adjacent two districts are 104 is preferably less than about 100 μ m, and is better for about 50 μ m.Each district in first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122 is respectively corresponding to light source 124,126,128,130 and 132, to provide light to first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122 respectively.More be respectively equipped with light guide structure 134,136,138,140 and 142 between each district in first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122 and the corresponding light source 124,126,128,130 and 132, thus with light source 124,126,128,130 and 132 luminous light transfer to light guide structure 104 in first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122 respectively.In a preferred embodiment, light guide structure 134,136,138,140 can be identical with the material of light guide structure 104 with 142 material, for example be all fiber optic materials, and light guide structure 134,136,138,140 and 142 can for example utilize press moulding mode directly to make simultaneously with light guide structure 104.Yet, difference between the two is, on the light guide structure 134,136,138,140 and 142 between light guide structure 104 and light source 124,126,128,130 and 132, surface structures such as site or breach are not set, therefore can be with light from light source 124,126,128,130 and 132 light guide structures 104 that import in the visible area.In addition, the light guide structure 134,136,138,140 and 142 that surface structure is not set on its of this part is suitable for carrying out the mixed light of source light, for example light source comprises RGB coloured light, can in the light guide structure 134,136,138,140 and 142 of this part, carry out mixed light, and can provide uniform light to import in the visible area in the light guide structure 104 on the light guide plate 100.In this preferred embodiment, be provided with several light guide structures between each district of light guide plate 100 and the corresponding light source, as shown in Figure 2, right more noticeablely be, between each district of light guide plate 100 and the corresponding light source light guide structure can only be set, and the quantity of light guide structure can be adjusted according to the device demand, is not limited to shown in the embodiment of Fig. 2.
After the light source 124,126,128,130 and 132 of correspondence is opened, see through corresponding light guide structure 134,136,138,140 and 142 transmission respectively, the light that is produced can be sent to respectively in the light guide structure 104 in first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122 of light guide plate 100.When the light of advancing in each light guide structure 104 is run into breach 106 surface structures such as grade of light guide structure 104, then owing to the total reflection angle of the light of advancing is destroyed, so light can penetrate light guide structure 104 by these surface structures, and provides display module required light, as shown in Figure 1.
Because the power supply of light source 124,126,128,130 and 132 is all independently of one another, and can independently control the switch of light source 124,126,128,130 and 132, therefore see through the switch of controlling each light source 124,126,128,130 and 132 respectively, the effect of the bright scanning in darkness of subregion can be provided.In this preferred embodiment, light guide plate 100 is divided into five districts such as first district 114, second district 116, the 3rd district 118, the 4th district 120 and the 5th district 122 of being arranged in regular turn by last down, yet the present invention also can be according to the demand of display device, and light guide plate is come subregion in addition with array way.
For example, in other preferred embodiments of the present invention, among the backlight module 144a as shown in Figure 3, two row about its light guide plate 100a can being divided into, and each row from top to bottom is divided into five districts again again, so can make light guide plate 100a be divided into into ten districts that the first district 114a, the second district 116a, the 3rd district 118a, the 4th district 120a, the 5th district 122a, the 6th district 114b, SECTOR-SEVEN 116b, Section Eight 118b, the 9th district 120b and the tenth district 122b etc. line up the array pattern.Wherein, be equipped with several light guide structures 104a on the substrate 102a surface in each district of light guide plate 100a.The first district 114a, the second district 116a, the 3rd district 118a, the 4th district 120a, the 5th district 122a, the 6th district 114b, SECTOR-SEVEN 116b, Section Eight 118b, the 9th district 120b and the tenth district 122b correspond respectively to light source 124a, 126a, 128a, 130a, 132a, 124b, 126b, 128b, 130b and 132b, to provide light to this ten district respectively.The first district 114a, the second district 116a, the 3rd district 118a, the 4th district 120a, the 5th district 122a, the 6th district 114b, SECTOR-SEVEN 116b, Section Eight 118b, the 9th district 120b, and the tenth district 122b and corresponding light source 124a, 126a, 128a, 130a, 132a, 124b, 126b, 128b, 130b, and more be respectively equipped with light guide structure 134a between the 132b, 136a, 138a, 140a, 142a, 134b, 136b, 138b, 140b, with 142b, use light source 124a, 126a, 128a, 130a, 132a, 124b, 126b, 128b, 130b, and 132 luminous light transfer to the first district 114a respectively, the second district 116a, the 3rd district 118a, the 4th district 120a, the 5th district 122a, the 6th district 114b, SECTOR-SEVEN 116b, Section Eight 118b, the 9th district 120b, and the tenth light guide structure 104a among the district 122b.In the same manner, these light sources can be made up of light emitting diode or laser diode, and wherein the power supply of these light sources is preferably independently of one another, and can independently control its switch.Because the power supply of these ten light sources is all independently of one another, and can independently control the switch of corresponding light source, therefore see through the switch of controlling each light source 24a, 126a, 128a, 130a, 132a, 124b, 126b, 128b, 130b and 132 respectively, can need provide subregion bright dark effect according to picture.
So backlight module 144 of the present invention quite is applicable to as scanning backlight unit or dynamic backlight unit with 144a, helps to improve dynamic image and contrast, further significantly promotes image quality.
What should note a bit is, though in the above-described embodiments, each district of light guide plate is equipped with several light guide structures, so in the present invention, each district of light guide plate can only be provided with a large-size and extend in light guide structure in the main plot, and the quantity of the light guide structure in each district on the light guide plate and size can be inequality, and can be adjusted on demand.
Because all light guide structures all are directly molded on the surface of substrate on the light guide plate, therefore can effectively control and shorten the distance between adjacent two districts, and can improve the outgoing light homogeneity of backlight module.In addition, more can exempt the problem that the light guide plate of same district is not faced in assembling, for example the location of light guide plate and problem aligned with each other.Moreover, owing to the light guide structure on the light transmission light guide plate of backlight module institute outgoing, therefore can reduce the quantity of light source components such as light emitting diode or laser diode widely.In addition, owing to utilize light guide structure to carry out mixed light to replace the mode of carrying out mixed light traditionally with longer light mixing distance, shortened light greatly and penetrated the light mixing distance of light guide structure to display module, therefore can effectively avoid producing the overlapping phenomenon of mixed light between the Qu Yuqu, further improve the sectional image contrast.
By the invention described above preferred embodiment as can be known, an advantage of the present invention is exactly because backlight module of the present invention comprises at least two districts, and these districts are respectively corresponding at least one light guide structure in the light guide plate, and not the light guide structure of same district separately corresponding to light source independently, therefore can provide subregion bright dark effect through controlling each light source respectively, in the liquid crystal indicator applicable to scan-type or dynamic display technology.
By the invention described above preferred embodiment as can be known, another advantage of the present invention is exactly because the light guide structure on the light guide plate of backlight module of the present invention is directly molded on the substrate of light guide plate, therefore can effectively control between each light guide structure and respectively distinguish gap between the light guide structure, not only can promote display quality, more help the raising of volume production yield rate.
By the invention described above preferred embodiment as can be known, another advantage of the present invention is exactly because in liquid crystal indicator of the present invention, the light guide structure of backlight module utilizes the optical fiber fabrication principle to be made on the film substrate, so can obtain the light guide plate of tool minim gap, and the light source that shows is propagated and is sent via the light guide structure on the light guide plate, therefore can significantly reduce the usage quantity of light emitting diode or laser diode, and can reduce the mixed light required separation distance widely, so can effectively reduce the thickness of liquid crystal indicator, and can solve effectively that the traditional backlight module has the mixed light overlap zone and the problem that causes brightness disproportionation.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.
Claims (15)
1. backlight module comprises at least:
Light guide plate is divided at least two districts, and this light guide plate comprises at least:
Substrate; And
A plurality of first light guide structures are directly molded on the surface of this substrate, and lay respectively in these districts; And
At least two light sources, correspond respectively to these the district, with provide light give these the district in these first light guide structures, wherein the power supply of these light sources is independently of one another,
Have a gap between these wherein adjacent first light guide structures, and this gap is less than 50 μ m,
Wherein be provided with at least one lattice point structure or at least one breach in each these first light guide structure.
2. backlight module as claimed in claim 1, wherein this backlight module is the scanning backlight unit.
3. backlight module as claimed in claim 1, wherein this backlight module is dynamic display backlight unit.
4. backlight module as claimed in claim 1, wherein these light sources are selected from the group of being made up of light emitting diode or laser diode.
5. backlight module as claimed in claim 1 wherein is provided with at least the second light guide structure between each these district and corresponding these light sources, to transmit light to these first light guide structures.
6. backlight module as claimed in claim 1, wherein these first light guide structures are made up of fiber optic materials.
7. backlight module as claimed in claim 1, wherein these first light guide structures are light guide bundles.
8. a liquid crystal indicator has at least two viewing areas, and wherein this liquid crystal indicator comprises at least:
Backlight module comprises at least:
Light guide plate has at least two districts, and wherein these are distinguished respectively corresponding to these viewing areas, and this light guide plate comprises at least:
Substrate; And
A plurality of first light guide structures are directly molded on the surface of this substrate, and lay respectively in these districts; And
At least two light sources correspond respectively to these districts, and to provide light to these first light guide structures in these districts, wherein the power supply of these light sources is independently of one another; And
Liquid crystal panel module is located on this backlight module,
Have a gap between these wherein adjacent first light guide structures, and this gap is less than 50 μ m,
Wherein be provided with at least one lattice point structure or at least one breach in each these first light guide structure.
9. liquid crystal indicator as claimed in claim 8, wherein this backlight module is the scanning backlight unit.
10. liquid crystal indicator as claimed in claim 8, wherein this backlight module is dynamic display backlight unit.
11. liquid crystal indicator as claimed in claim 8, wherein this substrate is the diffuse reflection sheet or is silver-colored reflector plate.
12. liquid crystal indicator as claimed in claim 8, wherein these first light guide structures are made up of fiber optic materials.
13. liquid crystal indicator as claimed in claim 8, wherein these light sources are selected from the group of being made up of light emitting diode or laser diode.
14. liquid crystal indicator as claimed in claim 8 wherein is provided with at least the second light guide structure between each these district and corresponding these light sources, to transmit light to these first light guide structures.
15. liquid crystal indicator as claimed in claim 8, wherein these first light guide structures are light guide bundles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101028095A CN101303476B (en) | 2007-05-09 | 2007-05-09 | Backlight module and LCD device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101028095A CN101303476B (en) | 2007-05-09 | 2007-05-09 | Backlight module and LCD device using the same |
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| Publication Number | Publication Date |
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| CN101303476A CN101303476A (en) | 2008-11-12 |
| CN101303476B true CN101303476B (en) | 2011-12-28 |
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| CN2007101028095A Expired - Fee Related CN101303476B (en) | 2007-05-09 | 2007-05-09 | Backlight module and LCD device using the same |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984281B (en) * | 2010-11-05 | 2012-07-25 | 友达光电股份有限公司 | Zonal light-emitting backlight module |
| CN102287717A (en) * | 2011-08-25 | 2011-12-21 | 上海交通大学 | Back light system with wave guide structure |
| CN103196079A (en) * | 2013-04-01 | 2013-07-10 | 苏州百纳思光学科技有限公司 | Ultrathin flexible backlight module for large-size liquid crystal television |
| CN103775920B (en) | 2014-01-29 | 2015-12-30 | 京东方科技集团股份有限公司 | A kind of scanning backlight module and display device |
| CN105336758B (en) * | 2014-07-18 | 2018-06-12 | 上海和辉光电有限公司 | A kind of OLED display panel |
| CN105954926B (en) * | 2016-06-08 | 2019-03-12 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN106772762A (en) | 2016-12-27 | 2017-05-31 | 惠科股份有限公司 | Backlight module |
| CN107870480A (en) * | 2017-09-16 | 2018-04-03 | 合肥惠科金扬科技有限公司 | A kind of optical fiber type backlight module |
| CN107861289A (en) * | 2017-09-16 | 2018-03-30 | 合肥惠科金扬科技有限公司 | A kind of backboard of optical fiber type backlight module |
| CN108490687B (en) * | 2018-03-30 | 2021-03-12 | 京东方科技集团股份有限公司 | Backlight module and display device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627150A (en) * | 2003-12-08 | 2005-06-15 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627150A (en) * | 2003-12-08 | 2005-06-15 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-327153A 2004.11.18 |
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| CN101303476A (en) | 2008-11-12 |
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Effective date of registration: 20111102 Address after: Miaoli County, Taiwan, China Applicant after: Chimei Optoelectronics Co., Ltd. Address before: Tainan County, Taiwan, China Applicant before: Chimei Optoelectronics Co., Ltd. |
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Granted publication date: 20111228 Termination date: 20190509 |